<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
	<head>
		<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
		<title>一列布局</title>
		<style type="text/css">
		body{ margin:0; padding:0; font-size:30px}
		div{ text-align:center; font-weight:bold}
		.main,.footer{ width:960px; margin:0 auto;}
		.head{ width:100%; height:100px; background:#ccc}
		.main{ height:600px;width:600px; background:#FCC}
		.footer{ height:50px; background:#9CF}
		</style>
	</head>
	<body>
		<div class="head">head</div>
		<div class="main">main</div>
		<div class="footer">footer</div>
	</body>
</html>